The object of the present patent application are 3-aminophenol derivatives of formula or the physiologically compatible, water-soluble salts thereof 1wherein R1 stands for a group of formula or a group of formula 2and colorants, based on a developer-coupler combination containing these compounds. The system operates for establishing and operating a plurality of Temporary Block Flows for transferring Packet Data Units in either an uplink or a downlink direction between the Logical Link Control layer of the mobile station and the Logical Link Control layer of the Serving General Packet Radio Service Support Node. Also, the use of Counting Bloom Filters for monitoring data streams allow an early duplicate removal of the input stream of data, resulting in savings in computation time and memory resources. Accordingly, the fire extinguisher is lightweight and does not rust. A total system response matrix has blocks. In order to generate each output signal, a pair of intermediate signals are generated, constituting the antidominant signal for each of the two adjacent principal output directions of the decoder.